Lithium Battery Comparison: Prismatic vs Blade vs Cylindrical vs Pouch LiFePO4 Battery

1. Cylindrical Lithium Battery

Common sizes: 18650, 26650, 21700, 32700, 32140, 4680

Advantages:

• Most mature manufacturing process with high yield rate.

• Lowest cost among all lithium battery types.

• Strong metal casing provides good mechanical protection.

Disadvantages:

• Poor space utilization due to gaps between round cells.

• Requires thousands of cells per EV pack, leading to complex BMS management.

Best for: E-bikes, power tools, entry-level EVs.

          Component layout and internal volume distribution of Tesla Cylindrical batteries 

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2. Prismatic LiFePO4 Battery

Common brands: CATL, BYD (legacy), EVE, Gotion,Benergy 

Advantages:

• High space utilization and customizable sizing.

• Rigid casing offers good safety protection.

• Currently the mainstream choice for most commercial EVs.

Disadvantages:

• No universal standard – sizes vary by manufacturer.

• Larger cell size requires careful thermal management.

Best for: Commercial EVs, buses, energy storage systems.

3. Blade LiFePO4 Battery

Pioneered by: BYD

Advantages:

• Structural innovation – cells serve as chassis beams, achieving over 60% volume utilization.

• Safety benchmark – passes nail penetration test without fire or smoke.

• Excellent heat dissipation due to thin, long shape.

Disadvantages:

• Extremely high manufacturing precision required.

• Individual cell replacement is difficult – often requires full pack change.

• Relatively weaker low-temperature performance (needs active heating).

Best for: Passenger EVs prioritizing maximum safety and chassis integration.

  Comparision production process between BYD BlADE battery and CATL prismatic cells. 

4. Pouch Lithium Battery

Common brands: LG Energy Solution, SK On, Farasis

Advantages:

• Highest energy density (280-300Wh/kg) due to lightweight aluminum-plastic film.

• Most shape-flexible – fits into irregular spaces.

• Low internal resistance for high discharge rates.

Disadvantages:

• Weak mechanical strength – needs external support structure.

• Higher risk of swelling or leakage over time.

• More expensive and harder to manufacture consistently.

Best for: Premium long-range EVs, drones, special devices.

Component layout and internal volume distribution of LG Chem E78 pouch cell